The crank sensor on your 1.7 liter fitted Honda public cannot be tested through a an easy multimeter resistance (Ω) test. It has to be tested in action.
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Thankfully, trial and error the crankshaft place sensor on your 2001-2005 1.7L Honda civic isn"t difficult and it does not need to be gotten rid of to it is in tested.
If girlfriend think the it has failed and also causing you civic to no start, then this indict will help you to check it with a multimeter in a step-by-step manner
NOTE: The adhering to wiring diagram may be of aid in your crank sensor diagnostic: 2001-2005 Crank Sensor Wiring diagram (Honda 1.7).
Symptoms that A poor Crankshaft position Sensor
The most evident symptom that your Honda civic will experience, when the crank sensor fails, is a ‘cranks yet does not begin condition’.
The fuel injection computer on your Honda civic is designed to sense when the crankshaft place (CKP) sensor is bad and set one the the adhering to diagnostic trouble codes.P0335: CKP Sensor No Signal.P0336: Crank Sensor Intermittent Interruption.P0340: Crank Sensor Intermittent Interruption.
But this doesn"t constantly happen. There are times as soon as the crank sensor has failed (and bring about your Honda public to crank however not start) however the fuel injection computer system does not set a code. Once this happens... The two symptoms that you can count on seeing are:No fuel injector pulses (when tested through a Noid light).No spark from any kind of of the 4 ignition coils (when tested with a spark tester).
So far, the above symptoms explain a crank sensor the has fully failed. Unfortunately, there are times that when the crank sensor fails, it fails intermittently.
Intermittent failures, that the crank sensor, space some the hardest to diagnose as result of the fact that the sensor works fine many of the time. And it commonly isn"t failing when you are trial and error it... Leading you to think that the sensor is fine.
NOTE: If your Honda civic is stalling intermittently in your particular case, you have to wait till your Honda public ‘cranks but does no start’ to be able to check the crank sensor. A clear indication the the crank sensor is working fine (and can"t be experiment at the moment) is her Honda Civic beginning and remaining running.
Crankshaft place Sensor Circuit Descriptions
The crankshaft position (CKP) sensor on her 2001-2005 1.7L equipped Honda public has 3 wires coming out of its exploit connector.
Each cable is shade coded and carries a certain signal and knowing which type will help you check the sensor.
Using the illustration that the crank sensor connector (in the picture viewer ~ above the left)... Here are the circuit descriptions of the three wires that the crankshaft position (CKP) sensor connector that I"ll be using in this tutorial.
|1||BLU||Signal. Feeds the PCM with the signal the crank sensor creates.|
|2||BRN/YEL||Ground. Feeds the crank sensor v chassis Ground.|
|3||YEL/BLK||Power. Feeds the crank sensor v power (12 Volts DC) native PGM-FI main relay 1.|
NOTE: you can uncover the crank sensor wiring diagram here: 2001-2005 Crank Sensor Wiring diagram (Honda 1.7).
TEST 1: Verifying The Crank Signal v A Multimeter
The very very first thing that we"ll perform to find out if the crank sensor is poor or no is too examine to watch if it"s producing a crank signal once you rotate over the engine by hand.
This signal is one ON/OFF voltage signal. Specifically: top top is once the multimeter displays 5 Volts DC and OFF is when it displays 0 Volts (.2 volt amounts to 0 Volts).
The means that i am going to show you just how to test the crank sensor is a very accurate way. However this accuracy depends on you turning the engine over by hand, which way using a half inch ratchet wrench and also the appropriate socket to rotate the crankshaft sheave by hand.
IMPORTANT: before you start this test you must disconnect every one of the ignition coils from your harness connectors. This safety and security precaution will store the automobile from starting.
Here are the test steps:
Jack up your Honda Civic and also place the on jack was standing (to gain access to the crank sensor). As soon as on jack stands, eliminate the driver next water splash shield.
Disable the ignition mechanism by disconnecting every individual ignition point from its harness connector.By disabling the ignition coils friend will save the vehicle from accidentally starting as you carry out the crank sensor test.
Place her multimeter in Volts DC mode because the signal the crank sensor creates is an on/off 5 Volts DC pulse.
Connect the black color multimeter test lead to a good Ground suggest on the engine. Or much better yet, floor the black color test lead straight to the negative (-) battery terminal making use of a jump begin cable.
Reconnect the connector ago to the sensor and turn the an essential to the On place (position II) yet don"t crank the engine. This will certainly power up the crank sensor through the voltage and Ground we must test that in action.
Using a 1/2 ratchet and also a 19 mm socket, revolve the crank wheel clockwise by hand.IMPORTANT: because that the accuracy of this test the crankshaft pulley should be turned by hand. Utilizing the starter engine to rotate the engine will certainly not provide you the results shown in this tutorial.
Your multimeter will register an ON/OFF voltage signal (if the sensor is OK). Top top is once the multimeter displays 5 Volts DC and OFF is as soon as it screens 0 Volts (.2 volt equates to 0 Volts).
Let"s translate your test result:
CASE 1: The multimeter registered the ON/OFF 5 Volts crank signal together you turn the engine v the ratchet. This is good, due to the fact that it method that the crank sensor is functioning properly and also creating the signal.
No further trial and error is required because the other two test in this post check that the crankshaft place (CKP) sensor is gaining power and Ground. Because your test confirms that the CKP sensor is creating a signal, then it also proves the it"s getting power and Ground.
CASE 2: The multimeter DID no register the ON/OFF 5 volt crank signal as you turn the engine through the ratchet. This test an outcome usually confirms the the crank sensor is bad and needs to it is in replaced. Around 90% of the time this is hitting the pond on the head, however I recommend the you inspect that the sensor is additionally getting power and also Ground too.
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By testing and also confirming the the CKP sensor is gaining power and Ground, you"ll be able to decisively check it is poor or the maybe an additional issue exists. For the following steps, go to: check 2: check Power and Ground Circuits.